EP0478354A1 - Elektronisches Reprographiesystem - Google Patents

Elektronisches Reprographiesystem Download PDF

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Publication number
EP0478354A1
EP0478354A1 EP91308836A EP91308836A EP0478354A1 EP 0478354 A1 EP0478354 A1 EP 0478354A1 EP 91308836 A EP91308836 A EP 91308836A EP 91308836 A EP91308836 A EP 91308836A EP 0478354 A1 EP0478354 A1 EP 0478354A1
Authority
EP
European Patent Office
Prior art keywords
sheet
image
sheets
job
purging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91308836A
Other languages
English (en)
French (fr)
Other versions
EP0478354B1 (de
Inventor
Michael E. Farrell
James F. Matysek
Carla J. Kinder
John C. Austin
Pedro R. Ortiz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of EP0478354A1 publication Critical patent/EP0478354A1/de
Application granted granted Critical
Publication of EP0478354B1 publication Critical patent/EP0478354B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5012—Priority interrupt; Job recovery, e.g. after jamming or malfunction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32609—Fault detection or counter-measures, e.g. original mis-positioned, shortage of paper
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32609—Fault detection or counter-measures, e.g. original mis-positioned, shortage of paper
    • H04N1/32625—Fault detection
    • H04N1/32635—Fault detection of reproducing apparatus or receiver, e.g. out of paper
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32609—Fault detection or counter-measures, e.g. original mis-positioned, shortage of paper
    • H04N1/32646—Counter-measures
    • H04N1/32667—Restarting a communication or performing a recovery operation

Definitions

  • the present invention relates to a system of electronic reprographics and, more particularly, to a system of electronic reprographics which performs printer dynamic job recovery without any loss in job integrity.
  • a lamp or flashing unit flashes light on a document and has an image created synchronously on a photoreceptor belt.
  • the photoreceptor belt picks up toner from which a copy is made.
  • a document or series of documents comprising at least one print job are successively scanned.
  • image signals are obtained and electronically stored.
  • the signals are then read out successively and transferred to a printer for formation of the images on paper.
  • a document Once a document is scanned, it can be printed any number of times or processed in any number of ways (e.g., words deleted or added, image magnified or reduced, etc.).
  • the processing or manipulation of the scanned documents can include deletion of one or more documents, reordering of the documents into a desired order, or addition ofa previously-or subsequently-scanned document or documents.
  • the printing or processing can be relatively synchronous with scanning, or asynchronous after scanning.
  • the system can then accumulate a number of scanned jobs in the system memory for subsequent processing or printing.
  • the order of the jobs to be printed may be different from the order of jobs as scanned, depending on the priority of the jobs and the desires of the operator for increasing productivity or through-put and decreasing printer or scanner down-time.
  • the printed job may include sheets having images of questionable integrity. This can be the result of a system fault, a raster output scanner fault causing a failure to image properly, paper misfeed or misregistration, lack of communication between the raster output scanner and control system, etc.
  • Printing systems which include job recovery, including sheet purging are disclosed in:
  • US-A-4,327,993 discloses a method and apparatus for performing job recovery in a reproduction machine, wherein purge sheets are sent to a tray not currently in use or to a tray which contains the rest of a copy job. When the purged sheets are sent to the tray which contains the copy job, they must be separated from the copy job once copying is complete.
  • US-A-4,206,996 discloses a job recovery method and apparatus wherein duplex job recovery is accomplished by purging all sheets, optionally flagging missing copies by inserting blank sheets into the copy job, and then rerunning the copy job as necessary.
  • one object of the present invention is to provide an electronic reprographic system which provides job recovery without requiring cycling down of the system.
  • the present invention provides an electronic reprographic system having printer dynamic job recovery which detects the presence of sheets having images of questionable integrity.
  • the system operates to remedy the presence of such sheets by redirecting all sheets of questionable integrity to a purge destination and recovering to the correct sheet in the job without requiring any operator attention.
  • Printing system 2 for purposes of explanation, is divided into a scanner 6, controller 7, and printer 8. While a specific printing system is shown and described, the present invention may be used with other types of printing systems, such as ink jet, ionographic, etc.
  • scanner 6 incorporates a transparent platen 20 on which the document 22 to be scanned is located.
  • One or more linear arrays 24 are supported for reciprocating scanning movement below platen 20.
  • Lens 26 and mirrors 28, 29, 30 cooperate to focus array 24 on a line-like segment of platen 20 and the document being scanned thereon.
  • Array 24 provides image signals or pixels representative of the image scanned which, after suitable processing by processor 25, are output to controller 7.
  • Processor 25 converts the analog image signals output by array 24 to digital and processes the image signals as required to enable system 2 to store and handle the image data in the form required to carry out the job programmed. Processor 25 also provides enhancements and changes to the image signals such as filtering, thresholding, screening, cropping, reductio/enlarging, etc. Following any changes and adjustments in the job program, the document must be rescanned.
  • Documents 22 to be scanned may be located on platen 20 for scanning by automatic document handler (ADF) 35 operable in either a recirculating document handling (RDH) mode or a semi-automatic document handling (SADH) mode.
  • a manual mode including a book mode and a computer forms feeder (CFF) mode, is also provided, the latter to accommodate documents in the form of computer fanfold.
  • document handler 35 has a document tray 37 in which documents 22 are arranged in stacks or batches. The documents 22 in tray 37 are advanced by suction feed belt 40, document feed rolls 41 and document feed belt 42 onto platen 20 where the document is scanned by array 24. Following scanning, the document is removed from platen 20 by belt 42 and returned to tray 37 by document feed rolls 44.
  • a document entry slot 46 provides access to the document feed belt 42 between tray 37 and platen 20 through which individual documents may be inserted manually for transport to platen 20. Feed rolls 49 behind slot 46 form a nip for engaging and feeding the document to feed belt 42 and onto platen 20. Following scanning, the document is removed from platen 20 and discharged into catch tray 48.
  • computer forms material is fed through slot 46 and advanced by feed rolls 49 to document feed belt 42, which in turn advances a page of the fanfold material into position on platen 20.
  • printer 8 comprises a laser type printer and, for purposes of explanation, is separated into a raster output scanner (ROS) 87, print module 95, paper supply 107 and finisher 120.
  • ROS 87 has a laser 90, the beam of which is split into two imaging beams 94.
  • Each beam 94 is modulated in accordance with the content ofan image signal input by acousto-optic modulator 92 to provide dual imaging beams 94.
  • Beams 94 are scanned across a moving photoreceptor 98 of print module 95 by the mirrored facets of arotary polygon 100 to expose two image lines on photoreceptor 98 with each scan and createthe latent electrostatic images represented by the image signal input to modulator 92.
  • Photoreceptor 98 is uniformly charged by corotrons 102 at a charging station preparatory to exposure by imaging beams 94.
  • the latent electrostatic images are developed by developer 104 and transferred at transfer station 106 to a print medium 108 delivered by paper supply 107.
  • Medium 108 may comprise any of a variety of sheet sizes, types, and colors.
  • the print medium is brought forward in timed registration with the developed image on photoreceptor 98 from either a main paper tray 110 or from auxiliary paper trays 112, or 114.
  • the developed image transferred to the print medium 108 is permanently fixed or fused by fuser 116, and the resulting prints discharged to either output tray 118 or to finisher 120.
  • Finisher 120 includes a stitcher 122 for stitching or stapling the prints together to form books, and a thermal binder 124 for adhesively binding the prints into books.
  • controller 7 is, for explanation purposes, divided into an image input controller 50, user interface (UI) 52, system controller 54, main memory 56, image manipulation section 58, and image output controller 60.
  • UI user interface
  • system controller 54 main memory 56
  • image manipulation section 58 image output controller 60.
  • controller 7 includes a plurality of printed wiring boards (PWBs) 70, coupled with one another and with system memory 61 by a pair of memory buses 72,74.
  • Memory controller 76 couples system memory 61 with buses 72, 74.
  • PWBs 70 include system processor PWB 70-1 having plural system processors 78; low speed I/O processor PWB 70-2 having UI communication controller 80 for transmitting data to and from UI 52; PWBs 70-3, 70-4 and 70-5 having disk drive controller/processors 82 for transmitting data to and from disks 90-1, 90-2 and 90-3, respectively, of main memory 56 (image compressor/processor 51 for compressing the image data is on PWB 70-3); image manipulation PWB 70-6 with image manipulation processors of image manipulation section 58; image generation processor PWBs 70-7 and 70-8 with image generation processor 86 for processing the image data for printing by printer 8; dispatch processor PWB 70-9 having dispatch processors 88 and 89 for controlling transmission of data to and from printer 8, and boot control- arbitration-scheduler PWB 70- 10.
  • the scanned image data input from processor 25 of scanner section 6 to controller section 7 are compressed by image compressor/processor 51 of image input controller 50 on PWB 70-3. As the image data pass through compressor/processor 51, they are segmentedinto slices N scanlines wide, each slice having a slice pointer.
  • the compressed image data together with slice printers and any related image descriptors providing image specific information(such as height and width of the document in pixels, the compression method used, pointers to the compressed image data, and pointers to the image slice pointers), are placed in an image file.
  • the image files, which represent different print jobs, are temporarily stored in system memory 61 which comprises a random access memory (RAM) pending transfer to main memory 56 where the data are held pending use.
  • RAM random access memory
  • UI 52 includes a combined operator controller/CRT display consisting of an interactive touchscreen 62, keyboard 64, and mouse 66.
  • UI 52 interfaces the operator with printing system 2, enabling the operator to program print jobs and other instructions, to obtain system operating information, instructions, programming information, diagnostic information, etc.
  • Items displayed on touchscreen 62, such as files and icons, are actuated by either touching the displayed item on screen 62 with a finger or by using mouse 66 to point cursor 67 to the item selected and keying the mouse.
  • Main memory 56 has plural hard disks 90-1, 90-2, 90-3 for storing machine operating system software, machine operating data, and the scanned image data currently being processed.
  • main memory 56 When the compressed image data in main memory 56 require further processing, or are required for display on touchscreen 62 of UI 52, or are required by printer section 8, the data are accessed in main memory 56. Where further processing other than that provided by processor 25 is required, the data are transferred to image manipulation section 58 on PWB 70-6, where the additional processing steps such as collation, make ready, decomposition, etc., are carried out. Following processing, the data may be returned to main memory 56, sent to UI 52 for display on touchscreen 62, or sent to image output controller 60.
  • Image data output to image output controller 60 are decompressed and readied for printing by image-generating processors 86 of PWBs 70-7, 70-8 (seen in Figure 5A). Following this, the data are output by dispatch processors 88, 89 on PWB 70-9 to printer 8. Image data sent to printer section 8 for printing is normally purged from memory 56 to make room for new image data.
  • system control signals are distributed via a plurality of printed wiring boards (PWBs). These include EDN core PWB 130, marking imaging core PWB 132, paper handling core PWB 134, and finisher binder core PWB 136, together with various input/output (I/O) PWBs 138.
  • a system bus 140 couples the core PWBs 130, 132, 134 and 136 with each other and with controller section 7 while local buses 142 serve to couple the I/O PWBs 138 with each other and with their associated core PWB.
  • the operating system software is loaded from memory 56 to EDN core PWB 130 and from there to the remaining core PWBs 132, 134 and 136 via bus 140, each core PWB 130, 132, 134, 136 having a boot ROM (not shown) for controlling downloading of operating system software to the PWB, fault detection, etc.
  • Boot ROMs also enable transmission of operating system software and control data to and from PWBs 130, 132, 134 and 136 via bus 140 and control data to and from I/O PWBs 138 via local buses 142. AdditionalROM, RAM, and NVM memory types are resident at various locations within system 2.
  • jobs are programmed in a job program mode in which there is displayed on touchscreen 62 a job ticket 150 and a job scorecard 152 for the job being programmed.
  • Job ticket 150 displays various job selections programmed, while job scorecard 152 displays the basic instructions to the system for printing the job.
  • System 2 has the capability to detect and correct for various faults. Upon detection of a fault, system 2 will take the appropriate actions defined for each individual fault, or simply take the worst-case action for cases where multiple faults are detected.
  • Dynamic recovery is defined as printer 8 job recovery without cycle down,and is used only in conjunction with the video loss purge which is described below. Dynamic recovery requires the printer 8 to assess the job completion progress of all partially-completed jobs and start recovery job scheduling without specific direction.
  • a pitch skip occurs.
  • a single pitch skip occurs during the printing of a job when controller 7 cannot provide the required print image to the printer 8 at the specified print time for that particular image.
  • Each pitch skip encountered represents a period of time when the printer 8, although in operation, is not producing any hard copy output.
  • the percentage of pitch skips is calculated as the total number of pitch skips divided by the total number of impressions made plus the total number of pitch skips.
  • Printer 8 can be thought of as requiring an image file at every print pitch, the images being provided to printer 8 by controller 7. If the controller 7 cannot provide the required image before printer 8 is ready to print it, the printer 8 waits, thus incurring pitch skips. The pitch skip is thus because of the controller 7 not being able to provide the required image fast enough.
  • the printer 8 may skip pitches when performing dynamic recovery after a video loss purge.
  • the printer 8 may skip pitches between the last video loss purge sheet and the next good sheet.
  • the actual number of skip pitches will be decreased by the number of side one sheets committed to a duplex loop at the time that the video loss purge started.
  • a video loss purge is performed.
  • the video loss purge is performed, for example, when there is detected a failure to image properly or when printer 8 detects sheet misregistration. Detection of such a fault automatically results in the application of the video loss purge.
  • Figures 8A-8C depict exemplary operation of system 2 upon performance of dynamic job recovery according to the present invention.
  • Printer 8 is informed of, or detects, a fault indicating the presence of a sheet in the paper path having a video image with a loss of integrity (step 200). Upon such detection, printer 8 redirects the specified sheet and all trailing sheets in the paper path to a specified purge location (step 202). Additionally,all scheduling of additional sheets is momentarily interrupted. According to the present invention, up to three sheets in advance of the specified sheet may be purged. Printer 8 waits for delivery of all purged sheets (step 204). Dynamic job recovery can then be performed as soon as the last purged sheet is delivered (step 206).
  • Figure 8B shows a flowchart depicting an optimized operation of system 2 upon performance of dynamic job recovery.
  • printer 8 is informed of or detects a fault indicating the presence of a sheet in the paper path having a video image witha loss of integrity (step 208).
  • printer 8 redirects the specified sheet and allfollowing sheets to a specified purge location (step 210). All scheduling of additional sheets is momentarily interrupted.
  • Printer 8 waits for delivery of the first purge sheet (step 212). From the first purge sheet delivery, the printer 8 determines the last good sheet (i.e., sheet whose image has no loss of integrity) which has been successfully delivered (step 214).
  • Optimized dynamic job recovery can then be performed as soon as the first purged sheet is delivered (step 216).
  • Jobrecovery includes rescheduling of the job based on the delivery of the last good sheet.
  • FIG 8C shows a flowchart depicting an advanced operation of, system 2 upon performance of dynamic job recovery.
  • Printer 8 as in the previous operations, is informed of, or detects, a fault indicating the presence of a sheet in the paper path having a video image with a loss of integrity (step 218). Upon such detection, printer 8 redirects the specified sheet and all following sheets to a specified purge location (step 220). Using information on the last sheet scheduled stored in the printer controller memory, the printer 8 immediately determines the last good sheet scheduled prior to the fault occurrence (step 222). Recovery to the correct sheet begins immediately without being based upon the delivery of purged sheets (step 224).
  • Figure 9 is a chart providing an overall comparison of the exemplary operations described above.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Facsimiles In General (AREA)
  • Fax Reproducing Arrangements (AREA)
EP19910308836 1990-09-28 1991-09-27 Elektronisches Reprographiesystem Expired - Lifetime EP0478354B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58961390A 1990-09-28 1990-09-28
US589613 1990-09-28

Publications (2)

Publication Number Publication Date
EP0478354A1 true EP0478354A1 (de) 1992-04-01
EP0478354B1 EP0478354B1 (de) 1995-03-29

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EP19910308836 Expired - Lifetime EP0478354B1 (de) 1990-09-28 1991-09-27 Elektronisches Reprographiesystem

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EP (1) EP0478354B1 (de)
JP (1) JP3373536B2 (de)
DE (1) DE69108500T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0661602A2 (de) * 1994-01-04 1995-07-05 Xerox Corporation Eliminierung von Deletionen und residualer Fixierölkontaminationen von xerographischen Drucken
EP0768579A2 (de) * 1995-08-31 1997-04-16 Kabushiki Kaisha Toshiba Bilderzeugungsgerät
US5839033A (en) * 1995-08-31 1998-11-17 Kabushiki Kaisha Toshiba Apparatus having function of setting binding margin, and method used by the apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10220645A1 (de) * 2002-05-08 2003-11-27 Oce Printing Systems Gmbh Verfahren, Druckgerät und Computerprogrammprodukt zum Drucken einer Datei auf Bögen mit dazwischen eingefügten Registerblättern
JP5253008B2 (ja) * 2008-06-18 2013-07-31 キヤノン株式会社 画像形成装置及び画像形成装置の制御方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206996A (en) * 1978-05-05 1980-06-10 International Business Machines Corporation Job recovery method and apparatus
US4327993A (en) * 1979-10-30 1982-05-04 Xerox Corporation Method and apparatus for performing job recovery in a reproduction machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206996A (en) * 1978-05-05 1980-06-10 International Business Machines Corporation Job recovery method and apparatus
US4327993A (en) * 1979-10-30 1982-05-04 Xerox Corporation Method and apparatus for performing job recovery in a reproduction machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0661602A2 (de) * 1994-01-04 1995-07-05 Xerox Corporation Eliminierung von Deletionen und residualer Fixierölkontaminationen von xerographischen Drucken
EP0661602A3 (de) * 1994-01-04 1996-01-10 Xerox Corp Eliminierung von Deletionen und residualer Fixierölkontaminationen von xerographischen Drucken.
EP0768579A2 (de) * 1995-08-31 1997-04-16 Kabushiki Kaisha Toshiba Bilderzeugungsgerät
EP0768579A3 (de) * 1995-08-31 1997-07-02 Toshiba Kk Bilderzeugungsgerät
US5839014A (en) * 1995-08-31 1998-11-17 Kabushiki Kaisha Toshiba Image forming method and apparatus for copying images on both sides of an image forming medium
US5839033A (en) * 1995-08-31 1998-11-17 Kabushiki Kaisha Toshiba Apparatus having function of setting binding margin, and method used by the apparatus

Also Published As

Publication number Publication date
DE69108500T2 (de) 1995-12-07
JPH04273266A (ja) 1992-09-29
JP3373536B2 (ja) 2003-02-04
DE69108500D1 (de) 1995-05-04
EP0478354B1 (de) 1995-03-29

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